21880190

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{113}}^1$

素因数の和:221

約数の個数: 48

約数和(自身を含む): 42837552

約数和(自身を除く): 20957362

約数列:

[1, 2, 5, 10, 17, 34, 67, 85, 113, 134, 170, 226, 289, 335, 565, 578, 670, 1130, 1139, 1445, 1921, 2278, 2890, 3842, 5695, 7571, 9605, 11390, 15142, 19210, 19363, 32657, 37855, 38726, 65314, 75710, 96815, 128707, 163285, 193630, 257414, 326570, 643535, 1287070, 2188019, 4376038, 10940095, 21880190]

約数ペア:

[(1, 21880190), (2, 10940095), (5, 4376038), (10, 2188019), (17, 1287070), (34, 643535), (67, 326570), (85, 257414), (113, 193630), (134, 163285), (170, 128707), (226, 96815), (289, 75710), (335, 65314), (565, 38726), (578, 37855), (670, 32657), (1130, 19363), (1139, 19210), (1445, 15142), (1921, 11390), (2278, 9605), (2890, 7571), (3842, 5695)]